Dresden 2009 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 40: Poster II: Bio- and Molecular Magnetism (1-9); Magnetic Coupling Phenomena/Exchange Bias (10-15); Magnetic Particlicles and Clusters (16-29); Micro and Nanostructured Magnetic Materials (30-51); Multiferroics (52-64); Spin Injection in Heterostructures (65-67); Spin-Dyn./Spin-Torque (68-93); Spindependent Transport (94-108)

MA 40.69: Poster

Freitag, 27. März 2009, 11:00–14:00, P1A

Spin dynamics in ferromagnetic antidot lattices — •Sebastian Neusser, Bernhard Botters, Georg Dürr, and Dirk Grundler — Lehrstuhl für Physik funktionaler Schichtsysteme, Technische Universität München, Physik Department,James-Franck-Str. 1, D-85747 Garching b. München, Deutschland

Our recent work on spin dynamics in antidot lattices is presented. We present a semi-analytical approach allowing the identification of the distinct eigenmodes of antidot lattices [1]. We find, both, extended modes spanning through the lattice and localized modes residing in individual unit cells. The influence of these modes on spin-wave propagation is discussed in the light of the emerging research field of magnonics; we find for antidot lattices that propagation is tailored by the orientation of the external field. Furthermore, we present experimental data of broadband ferromagnetic resonance performed on such systems [2] in good agreement with our theoretical predictions. Mode localization for different angles of the external field with the antidot lattice unit cell axis is discussed.

[1] S. Neusser, B. Botters, and D. Grundler "Localization, confinement, and field-controlled propagation of spin waves in antidot lattices" Phys. Rev. B, 78, 054406 (2008).

[2] S. Neusser, B. Botters, M. Becherer, D. Schmitt-Landsiedel, and D. Grundler, "Spin wave localization between nearest and next-nearest neighboring holes in an antidot lattice" Appl. Phys. Lett. 93, 122501 (2008).